Experimental cataract produced by 3 cm. pulsed microwave irradiations

PAPER manual AMA Arch Ophthalmol 1951 Animal study Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1001/archopht.1951.01700010390004 PMID: 14818493 Evidence Lab

Abstract

THE DEVELOPMENT of cataract as a result of electromagnetic radiations is well established. Formerly it was supposed that this effect was unique to the action of infra-red, ultraviolet and roentgen radiations, although as early as 1926 in a survey of work in these fields Duke-Elder1 suggested that other portions of the spectrum, if of sufficient magnitude, might produce cataract. On the other hand, as late as 1944 it was the opinion of Bellows,2 basing his views on the work of Legge3 and of Hartridge and Hill,4 that electromagnetic waves longer than 20,000 angstrom units would be absorbed completely by the cornea. In 1948 it was demonstrated by Richardson, Duane and Hines5 that lenticular opacities could be produced by continuous microwave radiations of 12.25 cm. wavelength. These observations were confirmed by the contemporary work of Daily, Wakim, Herrick and Parkhill,6 which was completed later in

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

unclear

Population

—

Sample size

—

Exposure

microwave

Evidence strength

Insufficient

Confidence: 46% · Peer-reviewed: yes

Main findings

The abstract states that cataract development from electromagnetic radiation is established and notes prior work demonstrating that lenticular opacities could be produced by continuous microwave radiation at 12.25 cm wavelength. The provided abstract excerpt does not report specific results for 3 cm pulsed microwave irradiation.

Outcomes measured

cataract
lenticular opacities

Limitations

Abstract excerpt is incomplete and does not provide methods, exposure parameters (e.g., power/SAR, duration), sample size, or results for the 3 cm pulsed microwave condition.
Frequency for 3 cm wavelength exposure is not stated in the excerpt.

Suggested hubs

rf-cataract (0.78)
Focus is on cataract/lenticular opacities associated with microwave (RF) irradiation.

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "cataract",
        "lenticular opacities"
    ],
    "main_findings": "The abstract states that cataract development from electromagnetic radiation is established and notes prior work demonstrating that lenticular opacities could be produced by continuous microwave radiation at 12.25 cm wavelength. The provided abstract excerpt does not report specific results for 3 cm pulsed microwave irradiation.",
    "effect_direction": "unclear",
    "limitations": [
        "Abstract excerpt is incomplete and does not provide methods, exposure parameters (e.g., power/SAR, duration), sample size, or results for the 3 cm pulsed microwave condition.",
        "Frequency for 3 cm wavelength exposure is not stated in the excerpt."
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.460000000000000019984014443252817727625370025634765625,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "cataract",
        "lenticular opacities",
        "microwave radiation",
        "pulsed microwave",
        "3 cm wavelength",
        "ophthalmology"
    ],
    "suggested_hubs": [
        {
            "slug": "rf-cataract",
            "weight": 0.7800000000000000266453525910037569701671600341796875,
            "reason": "Focus is on cataract/lenticular opacities associated with microwave (RF) irradiation."
        }
    ]
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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